Revert "Keep lines on the DOM if they are the target of mousewheel events"

This reverts commit f9e94e9779653e9d78310322ca510d8d07bb0475.
Revert ":memo: Use TomDoc in Atom class"

This reverts commit 16df6a32d687e1df5047fa65d70c82c093e6180e.
Revert "Add spec documentation"

This reverts commit 421cdb41b9e1e6eb812ed4c6efeef9425520ccd9.
Revert "Upgrade to settings-view@0.116.0"

This reverts commit 08e6dc20e1681f16cfe19296e4d52ff1df498b43.